升级商城逻辑

routes/regions.js

@@ -120,12 +120,37 @@ router.get('/zhejiang', async (req, res) => {
  */
 router.get('/provinces', async (req, res) => {
   try {
+    // 递归获取子区域的函数
+    async function getChildrenRecursively(parentCode, level) {
+      const [children] = await getDB().execute(
+        `SELECT code, name as label, level FROM china_regions 
+         WHERE parent_code = ? AND level = ?
+         ORDER BY code`,
+        [parentCode, level]
+      );
+      
+      // 为每个子区域递归获取其子区域
+      for (let child of children) {
+        if (level < 3) { // 最多到区县级别（level 3）
+          child.children = await getChildrenRecursively(child.code, level + 1);
+        }
+      }
+      
+      return children;
+    }
+    
+    // 获取所有省份
     const [provinces] = await getDB().execute(
-      `SELECT code, name FROM china_regions 
+      `SELECT code, name as label, level FROM china_regions 
        WHERE level = 1
        ORDER BY code`
     );
     
+    // 为每个省份递归获取城市和区县
+    for (let province of provinces) {
+      province.children = await getChildrenRecursively(province.code, 2);
+    }
+    
     res.json({
       success: true,
       data: provinces